I would just buy a normal sirfIII antenna with a mini smb plug on it and it will plug straight in, it will also get full signal from through the dash.

Quote:

Originally Posted by Booster4075

Why would another GPS antenna be faster?

I think gIzzE is a little confused... the sirfIII isn't an antenna, it's an entire GPS receiver with a built-in antenna. Replacing the GPS antenna with a SirfIII would be like plugging the Sirius antenna cable into the headset jack of a Sportster.